Preface:
================================================================================
In the spirit of contributing to the design pattern community (whilst learning
more about patterns), I followed Mark McFaddens example of converting the Java
examples associated with Head First Design Patterns to another computer
language: C++.
First, I would like to acknowledge the good work done by the authors of this
book and their support of my efforts. Second, I do not claim to be a Java
developer, so I may have misinterpreted a subtle Java notion or convention
during the conversion process. In this regard, I welcome (constructive) feedback.
Finally, I intend to provide three levels of interpretation (Bronze, Silver & Gold)
on two different platforms (Windows & Linux):
- Bronze; a literal (syntax) translation that produces identical output
- Silver; a lateral (semantic) translation that preserves the intent using
good C++ programming practices
- Gold: a modern level using templates and more STL.
Conventions:
================================================================================
A note about style:
1) I have adopted the Java idiom of specifying a members access specifier
(e.g, public, protected and private) on an individual basis rather than adhering
to the 'block' convention in C++. Although it requires a bit more typing, I like
its explicit clarity, rather than having to search up a class declaration looking
for its access specifier. Warning, personal opinion rant follows: I never understood
the complaint of having to do extra typing, if it makes your code easier to understand
and maintain then its worth the extra keystrokes. Okay, I'm done :-).
This convention revealed itself while I was creating the 'Bronze' version; when
my charter was maintain the original example and minimize any code changes. That is,
I simply wanted it to compile and run. I understand that adopting the Java convention
is a deviation from common C++ practices and some may balk at it (even ridicule it);
however, I have grown to appreciate its simplicly and explicite clarity.
2) I took liberties with header files. It is not my convention to put everything
into a single header file that includes the world. I have done so (like access
specifiers) to alter as little as possible from the original examples. I considered
changing it in the 'Silver' version (and I still might), but I am concentrating on
completing the leftover patterns and the 'gold' version at the moment.
3) I welcome positive & negative feeback as long as it is constructive. If there
is a better way to do something, or I simply "missed the boat" I would like to
know about it. If you have other ideas, would like to expand the examples or provide
alternate versions of them (say Linux) I would be happy to include them and your
name in future updates.
BRONZE
================================================================================
A 'syntactical' translation; simply get it to compile, run and produce the same
output as the Java examples with minimal changes. No regard was given for memory
leakes or class integrety.
version 1.0:
------------
Adapter:
* Duck and Turkey test drives' where combined into ducks.cpp and implemented by
defining (or not defining) the pre-processor definition: _DUCK_ADAPTER_
Factory:
* Original Pizzaaf has a logic error, it does not cut Chicago Style pizza's in squares.
Iterator:
* Renamed Menu to Menus to avoid a conflict between the project name and one
of its header files.
* MenuIterator was initially attempted but dismissed for the following reasons:
* It did not eliminate the need for 'PancakeHouseMenuIterator' as in the Java
version. In C++, 'PancakeHouseMenuIterator' became an 'adapter' that translated
the Java Iterator interface to the STL std::iterator interface.
Proxy:
* Deferred, pending suitable solution for RMI (most likely it will be
boost:: serialization implementation.) Or, something completely differrent.
MVC (Model, View, Controller)
* Deferred, pending suitable solution for GUI (most likely it will be a WTL
implementation.)
SILVER
================================================================================
A 'semantical' translation; Convey the samples explicit and implicit meaning
using C++ idioms and good practices; however, I still implement headers that
"include the world" and contain code; however, the primary intent is still to
demonstrate a pattern and keeps things as simple as possible.
The Silver version is 'volatile'! That is, it will continue to morph more and more
into what is termed 'Good C++ programming practices'. As stated, the 'Bronze'
version is a 'syntactical' translation only; however, it was also the foundation
for this version, which presented a dilemma: rework existing examples to implement
recognized C++ style, or provide more pattern examples, so its my intent to work
on patter examples and rework the code as I go.
version 1.0:
------------
* Initial release with basic C++ idioms
* Added test.bat (MSDOS style batch file that execute debug and release versions
version 1.1:
------------
* Added 'Bridge' and 'Builder' pattern examples
* Updated (this) readme.txt file
version 1.2:
------------
* Added 'Chain of Responsibility' pattern example (added vacation.txt as an
input file during execution of test.bat)
* C++ improvements: prepended and underscore (_) to all 'private' and 'protected'
members, better class member initialization
* Disabled compiler generated methods (copy constructor and assignment operator)
to ensure the integrity of the class.
* Better class construction in Strategy::MiniDuckSimulator::Duck and derived
classes.
* Updated (this) readme.txt file
version 1.3:
------------
* Added 'Flyweight' pattern example: "Fowlweight".
I deviated from the example in the book for two reasons: I wanted to 'sort'
ducks as illustrated in the 'Template Method' pattern and since that illustration
sorted by 'weight' I thought naming the example 'Fowlweight' combined both the
pattern and its intent. Since I deviated, I felt obligated to write a narrative
in the same tone as that used throughout the book. Here is my humble attempt:
"The number of birds migrating to Objective has overwhelmed the Quackologists
who are complaining that it is hard to keep up because the journaling program
you wrote is getting sluggish. Quackologists capture birds, categorize them,
weight them, tag them, and finally, record them with your program; however,
as the size of the flock grows your program begins to crawl. After hours of
drinking coffee at Starbuzz reviewing your design, you realize that some
traits are common to each type of bird; its type, the sound it makes and how
it swims. If only you could isolate the common (intrinsic) traits from the
unique (extrinsic) traits, its weight and tag number. Your redesign implements
the Flyweight pattern by creating a single instance for each type of bird and
each bird contains a reference back to its type."
version 1.4:
------------
* Added 'Interpreter' pattern (with 'Visitor'): "MiniDuckSimulator".
See 'readme.txt' in 'Interpreter' directory for additional information regarding
the implementation of this pattern(s).
Possible enhancements:
- add other keywords, such as 'for', 'if'
- add 'turkey' via adapter
version 1.5:
------------
* Added 'Visitor' pattern: "Menus".
See 'readme.txt' in 'Visitor' directory for additional information regarding
the implementation of this pattern(s).
version 1.6:
------------
* Added 'Mediator' pattern: "AutoHouse"
See 'readme.txt' in 'mediator' directory for additional information regarding
the implementation of this pattern(s).
headfirst c++代码实现
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headfirst c++代码实现 （580个子文件） 
test.bat 3KB Menus.cpp 5KB Menus.cpp 3KB Mediator.cpp 3KB Remote.cpp 2KB FowlWeight.cpp 2KB GumballStateWinner.cpp 2KB MiniDuckSimulator.cpp 2KB DuckSimulator.cpp 2KB Undo.cpp 2KB DuckSimulator.cpp 2KB GumballEMailHandler.cpp 1KB AutoHouse.cpp 1KB Pizzaaf.cpp 1KB Pizzafm.cpp 1KB HomeTheater.cpp 1KB DuckSimulator.cpp 1KB DuckSimulator.cpp 984B Ducks.cpp 930B DinerMergerI.cpp 929B Starbuzz.cpp 925B Remotes.cpp 817B DuckSimulator.cpp 777B Barista.cpp 714B MiniDuckSimulator.cpp 667B SimpleRemote.cpp 653B DuckSimulator.cpp 648B WeatherStation.cpp 578B chocolate.cpp 567B Pizzas.cpp 463B DinerMerger.cpp 416B stdafx.cpp 301B stdafx.cpp 291B Planner.cpp 278B GumballMachine.cpp 108B
MiniDuckSimulator.exe 776KB Planner.exe 732KB FowlWeight.exe 724KB DuckSimulator.exe 684KB AutoHouse.exe 672KB Menus.exe 664KB Remote.exe 660KB DinerMergerI.exe 656KB Undo.exe 656KB Pizzaaf.exe 656KB GumballStateWinner.exe 648KB DuckSimulator.exe 648KB WeatherStation.exe 644KB Remotes.exe 644KB HomeTheater.exe 636KB Starbuzz.exe 628KB DuckSimulator.exe 628KB DuckSimulator.exe 628KB DinerMerger.exe 628KB GumballEMailHandler.exe 628KB Pizzas.exe 592KB MiniDuckSimulator.exe 584KB Ducks.exe 576KB DuckSimulator.exe 576KB DuckSimulator.exe 576KB SimpleRemote.exe 576KB Pizzafm.exe 560KB Barista.exe 536KB Chocolate.exe 524KB Menus.exe 188KB MiniDuckSimulator.exe 176KB Menus.exe 176KB Planner.exe 176KB Remote.exe 168KB Undo.exe 168KB FowlWeight.exe 152KB AutoHouse.exe 152KB GumballStateWinner.exe 148KB DuckSimulator.exe 148KB DinerMergerI.exe 144KB GumballEMailHandler.exe 144KB Menus.exe 144KB HomeTheater.exe 140KB DuckSimulator.exe 140KB DinerMerger.exe 140KB Starbuzz.exe 136KB DuckSimulator.exe 136KB DuckSimulator.exe 136KB WeatherStation.exe 136KB Remotes.exe 136KB Pizzaaf.exe 132KB Pizzafm.exe 120KB Pizzas.exe 116KB MiniDuckSimulator.exe 112KB Barista.exe 112KB Ducks.exe 108KB DuckSimulator.exe 108KB DuckSimulator.exe 108KB Chocolate.exe 108KB SimpleRemote.exe 108KB Standard.h 725B stdafx.h 376B stdafx.h 376B Calendar.hpp 3KB VacationBuilder.hpp 3KB共 580 条
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